臭氧对陶瓷膜超滤-生物活性炭组合工艺效果的影响  

Effect of ozone on the combination performance of ceramic membrane ultrafiltration-biological activated carbon filtration

作　　者：郭建宁[1] 张锡辉[1] 张建国 盛德洋 胡江泳[3] 陶益[1] 

机构地区：[1]清华大学深圳研究生院,环境工程与管理研究中心,广东深圳518055 [2]东莞市东江水务有限公司,广东东莞523112 [3]新加坡国立大学土木与环境工程系,新加坡119260

出　　处：《中国环境科学》2013年第11期1946-1952,共7页China Environmental Science

基　　金：国家水专项(2008ZX07423-002-4);广东省科技计划项目(2012B030800001)

摘　　要：利用处理量为3L/d的臭氧陶瓷膜-生物活性炭（BAC）（工艺Ⅰ）和陶瓷膜-BAC（工艺Ⅱ）2种组合工艺处理受污染的原水,研究了工艺对原水中浊度、氨氮和有机物的去除效果,同时考察了臭氧对膜通量和BAC的影响.结果表明,未投加臭氧和2.0mg/L臭氧投加量下,两种组合工艺可去除原水中96%以上的浊度.组合工艺均可去除原水中1.0-2.0mg/L的氨氮.提高溶解氧浓度至30mg/L可强化氨氮的去除能力,两种组合工艺可至少彻底去除5.5mg/L的氨氮.投加2mg/L臭氧后,工艺Ⅰ可去除原水中48.3%的总有机碳（TOC）和51.8%的UV254.工艺Ⅱ对TOC和UV254的平均去除率分别为51.1%和48.2%.臭氧对浊度的去除无影响,但臭氧可改变部分有机物的结构,减轻膜的有机物污染.与未投加臭氧的工艺Ⅱ相比,投加臭氧使工艺Ⅰ中的膜通量提高了25%-30%.但残留臭氧可能影响后续BAC中的微生物,对BAC去除氨氮和有机物的能力产生不利影响.Two combination processes, including ozonation-ceramic membrane-biological activated carbon （BAC） （processⅠ） and ceramic membrane-BAC （processⅡ）, were tested to treat polluted raw water. The performance was evaluated with the removal efficiencies of turbidity, ammonium and organic matters in a scale of 3L/d.The effects of ozone on membrane flux and BAC were also considered. More than 96% of turbidity was removed by both combination processes either with or without ozone addition. The ammonium that can be removed by both processes was limited to 1.0-2.0mg/L. Increasing the dissolved oxygen to 30.0mg/L can lead to a complete removal of ammonium with the concentration as high as 5.5mg/L. The average removal efficiencies of the total organic carbon （TOC） and ultraviolet absorbance at 254nm were 48.3% and 51.8% for processⅠwithout ozone addition, 51.1% and 48.2% for processⅡwhen ozone dosage was 2.0mg/L. Ozonation had no effect on turbidity removal, while it resulted in the changes of organic molecular structure at an ozone dosage of 2.0mg/L and this helped alleviate the membrane fouling. Membrane flux in processⅠincreased by 25%-30% compared with that in processⅡ with no ozone addition. However, residual ozone may affect the microbial activities in the BAC, which impacted the removals of organic matter and ammonia negatively.

关 键 词：臭氧 陶瓷膜 生物活性炭 超滤 污染原水 

分 类 号：X52[环境科学与工程—环境工程] TU991.2[建筑科学—市政工程]